Studies of Global Electrodynamics and High Latitude Irregularities

研究人员建议继续他们目前对全球电离层电动力学和高纬度电离层等离子体波的研究，利用非相干散射雷达观测来研究全球电动力学。该计划的主要内容包括：(1)研究低纬电场的纬度和逐日变化；(2)低纬地区磁层和扰动发电机电场的影响；(3)利用Jicamara雷达和San Marco卫星的联合测量研究赤道漂移和风，(4)F区发电机电场及其纬度变化的研究；(5)纬度电场经验模式的建立。对高纬电离层等离子体波的研究主要包括对格陵兰和瑞典的雷达干涉仪数据的分析和解释。我们还打算继续进行火箭现场数据的解释工作，并开展理论研究。该程序的主要内容包括(1)研究极大和高度变化的极光洋流期间的E区波，(2)两个流波的非线性饱和的实验和理论研究，特别是在不利的磁方位角下，以及(3)雷达和火箭研究在极大场向电流期间在大约150公里高度的碰撞离子回旋波。总的来说，上述研究涉及电离层的运动以及电离层中波和其他不规则性的存在，从增加我们对电离气体(占宇宙材料的99%)中发生的过程的基本了解以及传播用于通信的无线电波的影响和雷达系统的有效运行的角度来看，这些研究都具有重要意义。

The investigators propose to continue their current research on global ionospheric electrodynamics and on plasma waves in the high latitude ionosphere, the study of global electrodynamics use incoherent scatter radar observations. The main topics of this program include (1) studies of the latitudinal and day to day variations of the low latitude electric fields, (2) the effect of magnetospheric and disturbance dynamo electric fields at low latitudes, (3) equatorial drift and wind studies using joint measurements with the Jicamarca radar and the San Marco satellite, (4) the study of F-region dynamo electric fields and their latitudinal variation, and (5) development of an empirical model for the latitude electric fields. The research on plasma waves in the high latitude ionosphere consists of mostly analysis and interpretation of radar interferometer data from Greenland and Sweden. We also intend to continue working on the interpretation of in-situ rocket data, and to carry out theoretical studies. The main aspects of this program include (1) studies of E-region waves during periods of very large and highly variable auroral currents, (2) experimental and theoretical studies of the nonlinear saturation of two stream waves, particularly at unfavorable magnetic aspect angles, and (3) radar and rocket studies of collisional ion cyclotron waves at altitudes of about 150 km during periods of very large field aligned currents. In general the above studies are concerned with motions of the ionosphere and the presence of waves and other irregularities in it, which have importance both from the point of view of increasing our fundamental understanding of processes occurring in ionized gases (making up 99% of the material of the universe) and of the effects of the propagation of radio waves for communication and of the effective operation of radar systems.